Measuring indicator or gage.



MEASURING INDICATOR 0R GAGE.

APPLICATION FILED APR. 18. 191s.

Patented Feb. 26, 1918 3 SHEETS-SHEET I.

A. HART & K. J. ALIVIFELT. VMEASURING INDICATOR OR GAGE.

APPLICATION FILED APR. la. |916.

Patented Feb. 26,1918

a SHEETS-#SHEET 2.

A. HART L K. J. ALIVIFELT'. MEASURING4 INDICATOR 0R GAGE.

APPLICATION FILED APR.18 I9|6 l n Patented Feb. 26, 1918.

MEASURING INDICATOR R GAGE.

Sptcication of Letters Patent.

lil NRL JOHAN ALVIFEllL'll, 0F LU'JLON, ENGLAND.

ratentea ren. ae, rar

Application med. April 18, 1916.V Serial No. 92,062.

I To all vwhom t may concern.'

Be it known that we, ARTHUR HART and KARL JOHAN r, subjects of the,

King of'lngland and the g of Sweden, respectively, and residents of Luton, in the county of Bedford', in the Kingdom of l England, have invented certain new and useful llmprovements in Measuring Indicators or Gages, of which the following is a specification.

Th1s invention relates to improvements in measuring indicators or gages of the mi-l crometer kind in which the movement of a projecting pin adaptedgto be engaged'by the articletobe measured is transmitted to a spring controlled pointer moving over a scale.

rlhe primary object of the present invention is to provide an adjustable test measuring gage or indicator ofthe above kind which will be accurate in use, of simple and reliable construction and which can be adjusted as to the units indicated by the pointer to suit varying kinds of work.

'llhe invention is illustrated in, and hereinafter described with reference to the accompanying drawings, in which thereto ;4

v Fig. 8 is a sectional side elevation of the body of the instrument shown in the preceding gure but showing another form of axial attachment applied thereto;

Fig. 9 is a sectional detail viewand Fig. l0 is a sectional plan view of a further modified form of attachment for usel with either of the instruments previousljT described, and .j

Flg. 11 is a partial sectional front eleva- 'tion of an instrument showing the upper adjustmenty tip or pin section and the instrument applied to the interior of a ring.

As shown, and referring generally to the various figures of the drawings, the improved instrument conveniently comprises a main frame or casing a upon or within which the pointer b land the transmission lever c are arranged. At its one or upper v end this casing a is of fan or quadrant form as shown and is provided with a partial cover plate a and a glass panel a2 through which the pointer b can be viewed while at its other or lower end the casing is of substantially cylindrical form with the measuring pin d extending therefrom and sliding in a guide sleeve e formed on the casing a. rllhe movement of the pin 0l is not directly transmitted to the two armed lever or pointer b vbut it bears by means of a knife edge or point bearing upon the end of an intermediate trans ission lever c which is fulcrumed at f, be' g kept up to its work by means of a tension spring g. This intermediate lever ovtransmits its movements to the lower arm or extension zof the pointer through the intermediary of a movable adjustment member i which may be manipulated or adjusted by means of suitable mechanism. For instance in the construction shown in Figs. l to 3 of the drawings the member is carried by or formed on an arm j which is pivotally mounted on a pin 'k passing through a slot Z in the cover a and secured in a finger piece or slide m operable from the outside of the instrument, as clearly shown in Fig. 3. l By this means the leverage can be adjusted as desired, and by suitably Calibrating the face of the plate a as shownat n in Fig. 1 the pointer b can be made to indicate any desired units upon a common scale o. Conveniently a point p may be formed on the slide Iml and a friction spring g may be provided to retain the slide in any position to which it has been moved. The spring g is adapted to .engage any one of a series of notches g* in one edge of the slide m. The distance between each notch corresponds with the distance between the di'erent graduations onthe plate a and when the slide m is adjusted the spring engages the different notches and retains the slide in its adjusted position. lln the lower part of the slide m v an elongated slot al is provided, which slot is adapted to coperate with a pin al1 in the lower part of the plate a1. By means of this construction, the slide m is guided in its movement and is also limited 1n its up- 'ward andk downward movement. A suitable returning spring r is arranged to bear on lthe' extended end z, of the pointer b as shown. The spring 7' is stronger than the spring g and consequently the pin d is normally held extended without the casing, the spring g holding the said pin in engagement with the lever c. In operation it will be v seen that the leverage between the pin d and the pointer will vary as the adjustment member z'4 is moved between the arms of the lever c" and the pointer b thus causing the readings of the pointer on the scale to vary in accordance with the predetermined movements of the slidem. The extension h and lever c are preferably as shown in Fig. 2

l.formed with opposed points or knife edges s and t respectively between which the adjustment member i is moved step by step and this arrangement insures that the member z' must alwaysbe in one of its predetermined positions and that any slight variations in its position will not affect the -readings of the pointer as could happen where the leverage is gradually variable as is illustrated in the slightly modified arrangement shown in Fig. 4 ,of the drawings. If desired the variation in leverage may be effected by makingthe intermediate member 'i inthe form of a bell crank lever as shown'in Fig. 5 and by arranging it upon a fulcrum pin k which islaterally slidable in a slot Z in the frame a similarly to the fore which moves in a slot Z and is connectedl to a sleeve v engaging the said strut.

A further modification of this latter method of operation is illustrated with referenceV to Figs. 7 and 8 in which the strut member z' is of elongated formation and is adapted to freely engage t-he underside of the pointer 'lever extension h and to be adjustable in notches u- 1n the lever c which kis preferably shaped and provided with. a

counterwei ht c vas shown.

In Figs. and 8 two separate-attachments or internal measuring adapters are shown applied .tothe instrument, the engagement belng eected by screwing off the lower ring fw, Figs. 1, 2, 3, and 1 1 and by screwing on the internally' screwed sleeve m of the 'attaohments. In Fig. 7 the attachment sleeve is of elbow form and contains an additional transmission lever y upon one end of -which the pin d is adapted to bear so as to receive motion from the outer pin d proper which extends radially outward from the lateral or horizontal portion z of the sleeve Adjustment to suit the particular size of ring to be measured is effected by means of a pair of radial screws 12 which are set at 120 from each other and from the said pin d as is more clearly shown in connectionl with the construction shown in Fig. 10 hereinafter described.

In the attachment shown in Fi 8, the sleeve is straight and an additional U- shaped lever 13 is arranged between the pin d and the lever y as shown, while in the constructionlshown in Figs. 9 and 10, a bellcrank lever 14 is interposed between a slidable extension rod 15 adapted to engage the end of the pin d andthe lateral pin d.

`In Fig. 11 of the'drawings the instrument is shown applied to the measurement of the 'internal diameter of a ring yof relatively large diameter and for such purposes the cover ring 16 is removed from the screwed extension or nipple 17 and a connecting sleeve 18 is screwed thereon. `This sleeve 18 is internally screw threaded and into it is adjustably screwed the end 19 of a measuring Apin 20 which is adapted to engage the work. It is retained in its set posltion by means of a clamping nut 21 which engages the end of the sleeve 18 which is longitudinally slotted to make it yieldable to the nut 21. By this means it will be understood that the device can be used for large' internal measurements within wide limits by using pins of suitable length, for intermediate measurements by the use of the attachment sleeves, and for l various dimensions by fixing the instrument in position above a fixed platen or other device.

What we claim is 1. measuring gage comprising a casing carrylng a graduated scale, a measuring pin proJecting therefrom, a movable ointer in said casing, a transmission lever 1n engagement with said measuring pin, an adjustable intermediate transmission member inter i posedI between the transmission lever and the pointer for varying the leverage of the transmission lever.

2. measuring gage comprising a casing carrying a graduated scale, a measuring pin projectlng therefrom, a movable pointer in said caslng, a transmission lever 1n engagement with said measuring pin, an adjustable intermediate transmission member interposed between the transmission lever and the pointer, and means connected to the intermedlate member for adjusting the same for varying the leverage ofthe transmission lever. i t

3. measuring gage comprising a casing carrying a aduated scale, a measuring `pin pro]ect1r 1g t erefrom, a movable pointer in sa1d casing, atransmission leve 1n engagement; wlth said measuring pin, an adjustable mtermedlate transmission member in- Larmes terposed between the transmission lever and the pointer, and a slide connected to the intermediate member for adjusting the saine for varying the leverage of the transmission lever.

4. A measurin gage comprising a casing carrying a gra uated. scale, a measuring pin projecting therefrom, a movable pointer in said casing, a transmission lever in engagement with said measuring pin, an adjustable intermediate transmission member'- interposed between the transmission lever and the pointer, a" slide connected to the said intermediate transmission member for adjustin the same, and means for retaining the s ide in its vadjusted position.

- r45. A measuringfgage comprising. a casing carrying a graduated scale, a pivoted pointer in` said casing, a spring controlling' said pointer, a measuring pin `projecting from said casing, atransmission lever-1n operative contact with said pin, a .spring connected to said pin for holding the same in engagement with said transmission lever, an

intermediate transmission member between said transmission lever and said pointer, a slide outside of the casing and connected to said intermediate kmember for'adjusting the same, and a spring for retaining the slide in its adjusted. position. j.

6. A measuring gage 'comprising a casing,

a measuring pin projecting therefrom, a -pointer u ivoted in said casing, adjustable internie late mechanism fortransmit'ning'the movement of the measuring in to the pointer, and means for detacha le connec- `tion with the casing for enlarging its measuring capacity, said means comprising a nipple secured to the casing, a sleeve adapted to be screwed onto said nipple, a pin in screw-threaded engagement with said sleeve and adjustable therein, and a clamping-nut forholding the pin in its adjusted position.

7. A measuring gage comprising a casing, a measuring pin projecting therefrom, a pointer ivoted .in said casing; adjustable intermediate mechanism for transmitting the movement of the measuring pin to said pointer, and means for detachable connec- Ation with said casing foren'abling the gage to measure d iderent types of articles, said means comprising an extension, a lever pivoted in the extension adapted to be attached to the casing, and a pin projecting from said extension, the opposite ends of the pivoted lever respectively engaging the pin projecting from the casing and the pin projecting from the extension, whereby the movement of the pin in the casingis transmitted to the pin 1n the extension.

8. A measuring gage comprising a casing,

a measuring pin projecting therefrom, a pointer pivoted in said casing, a pivoted main transmission lever in the casing and engaging the measuring pin, an intermedi- 'ate transmission lever interposed between the ointer and the maintransinissionlever, a slide mounted on the casing to which the intermediate transmission lever is connected, means for adjusting the slide ,to move the intermediate transmission lever to did'erent rality of projections,'one end ofv said transmission lever also being provided with a plurality of'proj ections in substantiallyhorizontal alinement with the projections of the ointer, anintermediate transmission meiner Vinterposed between the pointer and the main transmission lever and adapted to be adjustedto assume a position between either pair of oppositely disposed projections,

whereby the leverage of the main transmis-- sion lever is varied, and means for adjusting said intermediate transmission lever.

ank

ln testimony whereof we hereunder sign our names to this specication.

' Aia'rnun Y f naar.. Jorian nrnrfr. 

